The City of Gaithersburg's Permitting and Inspections division, within Planning and Code Administration at 31 South Summit Avenue, provides permitting and inspection services for all types of construction inside the city limits — building, electrical, mechanical, fire systems, grading and sediment control, forest conservation, new road construction, storm drains and stormwater management. A property inside Gaithersburg does not go to Montgomery County's Department of Permitting Services for its building permit, though county and regional agencies may still be involved in impact taxes, utilities and outside reviews.
The city's permit list is broader than the building code alone. Permits are generally required for constructing, enlarging, altering, moving or demolishing structures; for all electrical, mechanical, fire protection and site development work; for tree removal; for sign installation or modification; for sheds, decks and patios that alter drainage; and for interior remodelling. The city notes that its exceptions do not apply to properties in the historic district, and it no longer takes inspection requests by telephone — all scheduling is online, and requests must be in before noon the preceding business day.
This guide covers the City of Gaithersburg. Montgomery County’s Department of Permitting Services covers the unincorporated county and communities such as Montgomery Village and North Potomac that surround the city, and it also issues the building permits inside Takoma Park, where the city adds its own letter and tree, stormwater and right-of-way permits. The City of Rockville runs its own programme as well.
Noon the day before, online only. The city no longer accepts inspection scheduling through its automated telephone line — all inspections must be scheduled online, and every request must be received before noon on the preceding business day. A Thursday-morning inspection is booked by Wednesday lunchtime or it does not happen that week.
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Get a free quote →What requires a building permit in Gaithersburg?
Typically permit required
- Tree removal, and forest conservation work, permitted by the city alongside the building and trade permits
- Sheds, decks and patios that alter drainage, and any grading or sediment control work
- Signs, fire systems, storm drains and stormwater management, each permitted by the same division
- New buildings, additions and any structural work on an existing building
- Interior alterations that reconfigure space, add plumbing fixtures or extend circuits, under the building or residential code and the Maryland Building Rehabilitation Code
- Decks, accessory structures above the local exemption threshold, retaining walls and swimming pools, including above-ground pools
Often exempt
- The city's published exceptions to the permit requirement — which do not apply to properties in the historic district
- Painting, wallpapering, interior finishes, cabinets, flooring and trim
- Like-for-like replacement of windows and doors in the same opening
- Small detached accessory structures below the jurisdiction's exemption threshold and fences below its height limit — the zoning rules still apply
- Minor repairs that do not remove or alter structural members
What is actually local, and what is not
The code editions are the state's. Gaithersburg's layer is the enforcing office and its amendments to the building and residential codes, its fee schedule, its grading ordinance and its stormwater programme under MDE criteria, and the city's own permitting programme inside the city limits and its tree removal and forest conservation permits.
Maryland enforces one statewide set of codes, the Maryland Building Performance Standards (COMAR 09.12.51), through the county or city permit office, which may amend the building and residential codes for local conditions. Maryland rules
Who handles permitting in Gaithersburg?
The Permitting and Inspections division within Planning and Code Administration is the enforcing office for the city, administering the codes and standards adopted by the city with its own amendments to the building and electrical codes. The city's planning department handles zoning and site development, the historic district commission reviews designated properties, and Montgomery County and regional agencies may still be involved in impact taxes, utilities and outside agency reviews.
Not sure this scope needs a permit?
Get a free quote →| Detail | Information |
|---|---|
| Department | City of Gaithersburg Permitting and Inspections Division |
| Office | 31 South Summit Avenue, Gaithersburg, MD 20877 |
| Phone | (301) 258-6330 |
| Hours | Monday to Friday, 8:00 am to 5:00 pm |
| Filing | City online services portal, with permit status and plans viewable by the public |
| Inspections | Online only, requested before noon the preceding business day |
In 2025, building permits issued in Gaithersburg authorized 8 new privately owned housing units, according to the U.S. Census Bureau Building Permits Survey.
Permit types
Residential permits
A Gaithersburg house project files through the city's online services portal with a dimensioned site plan, floor plans and a cost estimate, and takes the city's own permits for tree removal or drainage-altering work as well as the building permit. A contractor improving a house holds the state home improvement licence; an owner doing their own work should confirm with the division whether they may take out the permit themselves. Electricians working in the city also register with it.
Commercial permits
Commercial work in Gaithersburg takes city site permits alongside the building and occupancy permits, with grading and sediment control, forest conservation, storm drains and stormwater management all permitted by the same division. Permit status and plans can be tracked publicly through the city's portal, which lets anyone follow development activity through the review process.
Prior approvals, plan review and the local clock
In Gaithersburg the city's forest conservation and tree ordinances apply alongside the state Forest Conservation Act, the historic district narrows the permit exceptions, and Montgomery County impact taxes and regional utility agencies may still reach a city project. Maryland sets no deadline for deciding a building permit (though since 1 October 2026 the office must decide within 30 days whether a housing application is complete) — Gaithersburg publishes its own targets, and they are the number to plan against.
Rather talk it over?
Call 1-855-478-4290 →Maryland licenses home improvement contractors through the Maryland Home Improvement Commission and home builders register with the Attorney General; trade licences are mostly state licences, but some counties and WSSC license or register trades themselves. Maryland rules
Gaithersburg permit costs and fees
Fees follow the city's schedule, with residential improvement permits carrying a minimum that rises with project cost, and electrician licence application fees charged by the same division.
| Item | Fee or rule |
|---|---|
| Residential improvement | A minimum fee, rising to a higher minimum where the project cost exceeds the city's threshold |
| Commercial permits | City schedule by project type and valuation |
| Tree removal and forest conservation | Permitted and charged by the city alongside the building permit |
| Electrician licences | Master and limited electrician application fees on the city schedule, renewable online |
| County charges | Montgomery County impact taxes and utility agency fees may still apply to a city project |
| Inspections | Scheduled online only, before noon the preceding business day |
The historic district removes the exceptions. The city's published exceptions to the permit requirement come with a caveat: they do not apply to properties in the historic district. Work that needs no permit elsewhere in Gaithersburg needs one on a designated property, and the city asks applicants to confirm the position before starting.
Rather not deal with the building department?
Get a free quote →Trade permits and who may pull them
Permit required
- Tree removal — a city permit, separately from any building work
- Electrical — state-licensed master electrician; separate electrical permit
- Plumbing and gas — a WSSC Water-licensed plumber or gasfitter; plumbing and gas permits and inspections from WSSC Water (301-206-4003), not the city
- HVACR — state-licensed HVACR contractor; mechanical permit
- Fire protection, alarms and sprinklers — fire marshal review, state or local, with the building permit
Typically exempt
- Like-for-like fixture, receptacle and switch replacement where the licensing boards' rules allow it
- Low-voltage and communications wiring below the local permit threshold
Trade work is permitted separately and inspected locally or, for electrical work in many counties, by a state-certified private inspection agency. Maryland rules
How to apply for a Gaithersburg building permit
Zoning certification, grading and sediment control, stormwater, forest conservation and Critical Area review run ahead of the building permit.
The home builder registration number (required by state law for new homes) or, where the office asks for it, the Maryland Home Improvement Commission licence number goes on the application.
The local application with the building, residential and energy code submittals the scope requires, and trade permits alongside.
Reviewers in the local office check the building, residential and energy codes as the jurisdiction amended them; corrections are answered in writing.
Fees follow the jurisdiction's ordinance and are due before issuance.
Footing to final by permit number, then the use and occupancy certificate that closes the permit.
Review, corrections and what actually causes delay
Gaithersburg publishes permit status and plans openly through its portal, so an applicant can follow a file through review. What delays a project here is an application filed with the county for a city address, a drainage-altering patio treated as exempt, and an inspection requested after the noon cut-off.
Want this handled start to finish?
Get a free quote →Inspections in Gaithersburg
Inspections follow the adopted codes' required sequence — footing, foundation, framing, rough trades, insulation and final — and are requested from the local office by permit number. Work that passes final receives a use and occupancy certificate for new buildings and changes of use, or a final approval on the permit for everything else. Gaithersburg schedules all inspections online through its portal, with requests due before noon the preceding business day; the division inspects building, electrical, mechanical, fire systems, grading and sediment control and stormwater work.
Gaithersburg permit search and official resources
- Gaithersburg Permitting and Inspections — the division, adopted codes and inspection scheduling
- Gaithersburg general permits — tree, sign, grading, tank and special event permits
- Montgomery County Department of Permitting Services — the county office that covers the land outside the city
- Maryland Building Performance Standards — the statewide code adoptions from the Department of Labor's Building Codes Administration
- Maryland Home Improvement Commission — home improvement contractor licensing and the guaranty fund
- Home Builder Registration Unit — new home builder registration with the Attorney General
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
Does Montgomery County permit inside Gaithersburg?
No. The city runs its own permitting and inspection programme inside the city limits, though county impact taxes and regional utility reviews may still apply.
Does tree removal need a permit?
Yes. The city permits tree removal and forest conservation work alongside its building, trade and site permits.
Do sheds and patios need permits?
Where they alter drainage, yes — the city lists sheds, decks and patios that alter drainage among the work requiring a permit.
How do I schedule an inspection?
Online through the city's portal only; the automated telephone line is no longer accepted, and requests must be in before noon the preceding business day.
Do the permit exceptions apply everywhere?
No. The city's exceptions do not apply to properties in the historic district.
Which code edition applies?
The 2021 editions of the International Building Code, International Residential Code and International Energy Conservation Code with Maryland modifications, effective statewide on May 29, 2023 under the Maryland Building Performance Standards, with city amendments to the building and electrical codes.
Simplify Gaithersburg permitting with Alliance Permitting
Gaithersburg permits more categories than most Maryland cities and books none of them by phone. We confirm the jurisdiction from the city line, file the tree and drainage permits with the building permit, and book inspections inside the noon window.
Ready to break ground in Gaithersburg sooner?
Send us the scope and the parcel. We confirm the review path with the City of Gaithersburg Permitting and Inspections Division, assemble the submittal, file it, and track it through issuance — corrections included.
More Maryland permitting guides
More Maryland permitting guides
This guide is provided by Alliance Permitting for general information about Gaithersburg permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.